As I expected, membership counts for the end of September were up quite a bit over August, from 111,137 to 113,368.
(membership age group detail removed, not accurate)
The membership graphs at https://www.uschess.org/datapage/USCF0200.htm and the month-by-month numbers in tabular form at http://www.uschess.org/datapage/USCFMEMB0200.htm have both been updated.
Mike Nolan